Rolls for rolling rods



UNITED i STATES PATILMIQM HENRY A. WILLIAMS, `OF TAUNTON, MASSACHUSETTS.

ROLLS Foa ROLLING Roos, sbo.

SPECIFICATION forming part of Letters Patent No. 367,8/779, dated August9, 1887.

i Application filed October 4, 1886. Serial No. 215,232. (No model.)

T0 all whom, it may concern:

Be it known that I, HENRY A. VILLIAMS, of Taunton, in the county ofBristol and State of Massachusetts, have invented a new and usefulImprovement in Machines for Reducing Metal Rods, of which the followingis a specification, reference being had to the accompanying drawings.

Figure 1 is a plan of part of a machine provided with reducing andfinishing rolls embodying my invention.Y Fig. 2 shows a portion of apair of finishing-rolls embodying my invention, with part of a spindlebetween them. Fig. 3 shows a portion of a pair of reduci n g-rol lsembodying my invention; and Fig.

4L shows ajpair of rolls of uniform diameter embodying my invention,with a portion of a spindle between them.

Machines for reducing metal rods by pressure between a pair of rolls,with the axis of the rod substantially parallel with the axis of therolls, have long been know/n; and my invention is an improvementapplicable to machines of this class, including machines in which theworking-surfaces are on plates instead of rolls, for, as will be clear,the working-surface may be either the periphery of a roll or the face ofa metal plate. Inasmuch as I esteem that form of machine in which rollsare used as preferable, I have shown my invention as applied to thatform; but, as will be clear, it is applicable to either form.

du reducing-machines I have found that the amount of surface-contactbetween the surfaces of the reducing rolls or plates and the surface ofthe rod to be reduced is so great that it greatly increasesthedifficulty of reducing the rod to its desired shapedas, for instance, inreducing a rod of uniform diameter' to a taper, (as in making spindles,hacklepins, or the like,) or a rod of uniform diameter to varyingdiameters, (as in making car-coupling pins,) or in the manufacture ofsteel bullets from a rod of uniform diameter. I have discovered thatthis difficulty is obviated by cutting slanting grooves in the.reducing-surfaces, and so arranging these grooves that theworking-surfaces between them shall always be opposed. Slanting groovesthus arranged leave the working-surfaces unaltered, so far as concernstheir operation in reducing the rod to its desired shape, (whethertapered, conical, spherical, or cylindricaL) but greatly affeet-theoperation of these surfaces, by causing them to act in a novel andpeculiar manner, for each working-surface is practically divided intoanumber of narrow strips, each doing its part of the work. Moreover, theslanting grooves allow free space for the motion of the particles ofmetal in the rod which is reduced.

In'order to insure a smooth surface on the finished article, it isnecessary that the width of the spaces between the grooves shall beslightly greater than the width of the grooves, as this causes eachstrip of the working-surface to operate not only on its own portion ofthe rod, but also to operate at its edges on that portion 'of the bedoperated upon by the neighboring strips of the working-surfaces. Allthis will be clear to all skilled in the art from the drawings, whichillustrate my invention as applied to the rolls of a reducing-machinewhich forms the subject-matter of my application for patent now pending,Serial No. 194,455, tiled March 8, 1886.

In Figs. l, 2, and 3 the rolls are designed for a spindle, and the otherrolls for reducing a rod to a taper, or when aV rod is inserted be tweenthem and they are brought slightly nearer together and set they simplyreduce the diameter and true a cylindrical rod. These rolls and theother parts shown are the same as in my pending application, (and arethere fore not described here,) with the exception thatthe'working-surfaces of the rolls are subdivided into a number ofstrips, d a a2, Snc., by a number of slanting grooves, b b' b, V&c., thestrips and the grooves extending entirely around the rolls. Each ofthese surfaces a da, as will now be clear, does its own work on the rodto be reduced, but the total work done by all is precisely the same asif the original working-surface had not been subdivided by the grooves;but the work is done far more read- -ilyand with less resistance fromthemetal of the rod to be reduced, because the grooves allow the metalto flow freely, which flow would be obstructed were the rollingvsurfacenot subdivided by the slanting grooves.

The depth of the grooves is not material, as

Vhat I claim as my invention is- In a rod-reducing machine, twoworkingsurfaces, each of which is wholl y made up of a 15 series ofslanting lands, a a' ai, &c., separated by grooves b b b2, the.,substantially as and for the purpose set forth.

HENRY A. VILLIAMS.

Witnesses:

1T. E. MAYNADIER, M. W. MAYNADIER.

